Bearing bolster for spindles



E. BOWKER BEARING BOLSTER FOR SPINDLES July 26, 1932.

Filed Aug. 11, 1928 fig. ZT

3b da Patented July 26, 1932 (UNITED sfr-Aras ERVIN Bowman, `or FALLnIvEa-nAssncnUsE'r'L-is i PgxTENT go-r-"l-*lceA Banni-Ne BoLs'rnn Fon-sPrNnrEs i Application medaugust 11, 1921s.* serial No; 298,969.,`

upper end toengage a longitudinal groove* in a fixed hollow casing `orbase, which con-V tains it. In practice these keys wear out quiterapidly and, furthermore,the interior bearing-surface at the upper endof lthe holster which supports the spindle blade lat'- erally becomes-enlargediby wear, so that for vboth reasons the bo ster'becomesineilieient fes kin

and is no longer suitable for use.- y'Thereplacement oftheexternalf'keys"onthe bolster is not only expensive but it results'fin alarge loss through'breakage of the -bolsters in ,attemptingto repairthem.' "f The present invention `dea-ls with this prob-Kv lem byproviding an easilyl replaceable key for locking' the bolster againstrotationin'its containing base and al'sofor 'compensating for the wear'of the annular bearingsurface inside the upper end of the bolster-i' jP Generally speaking; this improvement compri'sQSV an en dwiseVremovable' *sleeve or collar" provided witli'an integral key so thatwhen slipped over the upper reduced end of the bolster it serves as aninterlocking means for keying or locking the bolster against rotation inthe hollow base, and also serves to provide a close fitting lateral orradi al bearing at the upper end of the bolster for properly supportingthe spindle blade at this point, instead of the bearing that hasvbecomeunduly enlarged through wear in service. This and other features of theinvention will be particularly described in the following speciiicationand will be deined in the claims annexed.

In the accompanying drawing I have illustrated a cheap and convenientform of replaceable vcollar or sleeve embodying the principles of thisinvention, in which Fig. l is a side elevation on a somewhat enlargedscale showing the bolster equipped with the key and bearing collar 4withthe lines. Y f

Fi 2 is a vertical sectionthrough the base and olster on thesectionalplane 2`2 of Fig.3.

Fig. 3 is a transverse y"section on the' plane 3-3ofFig-1.` l Fig. 4, isa perspective view showing the detail ofthe removable collar or sleeve@The vbolster-containingloase or Casin 1v is of usual and well knownconstruction, eing containingl -fixed baseyindicatedf in dottedkprovided with 'a vertical groot/e1a extending down from'l'the top for adistance to receive theusual locking key projectingllaterally from theupper end of thebolster.

lThe bolster 2-is' of `usual' construction,ex'-L e cepttha't its upper`end is reduced fora distance of halfen inch, more: or less, accord'- lngtof conven A ienc'e, leaving an annular shoul deat'Qxf v f andis'pr'efer'ably made' of` thin"sheet stock, n such as brass'or othersuitable materi'al, which readily admits of Vbeing drawnlby drawing'andforming dies into'vappropriate shape to servepits purpose, Thisco'llaris in the' form of' al10lloow-cylindrical shell 3, p whose up er end is,turned inward and down# ward to'V orm an interior'skirt 3a of smallerdiameterwhich forms kailateral bearing surfacejoffproperfdiameter toengage and' laterally support the corresponding portion of the spindleblade 55 zThe outervmember of .f 70 he replaceable key is shown inFigflf o thiscollar alongfonefside; is struck 'out-V "i ku'rardl'y toform a laterally proj ecting :ribf or key 3b,"while approximatelyopposite ytherib 3b a "longitudinal portion of `'the metal' lisstruck-inwardly' to form a concavos'convex interior key 3c, which iskdesigned to fit into v one of the-*usual* vertical oil 1 grooves`` 2bformed 'onthe exteriorof the. upperportion ofvthebols'ter.'f ltl will beseen that the interior key, 3, when'the collar is slippedoverthefup'pery reduced endy of the bolster, will vslide-finto the oilgroove, of the bolster," thus 'interlock'- ingthe collar :with thebolster-againstrel'ative rotation, while the lextgernalfkey. -telescopesinto the key-wayv oriinternal groove at the upper endof the base ioreasing,v as

shown at la to interlock the collar against rotation relative to thefixed casing or base. I have, therefore, a collar that can be readilyslipped on and of the upper end of the bolster, which is formed withintegral keys, external and internal, for engaging respectively thecontaining base member l and the loosely mounted bolster 2, so thatrotation is prevented.

Furthermore, by forming the collar or sleeve with an interior skirt 3 ofthe proper diameter to form a proper bearing support for this portion ofthe spindle blade, I compensate for the enlargement of this bearing bywear, since these collars are readily slipped on and off and are veryinexpensive, as they can be formed very cheaply by suitable dies so thatby their renewal Jfrom time to time, as the key and lateral confiningbearing tend to become inefficient, the bolster is easily renovated in aform fully equal to a new bolster.

A further advantage of this construction is that existing holsters maybe easily fitted with these renovating collars merely by turning downthe outside of the upper end portion of the bolster for a short distanceto permit the locking and bearing collar to be slipped over the'end ofthe bolster into operative position, as shown in Fig. 2. The life of abolster provided with this construction is indefinitely prolonged andthe renovation of the bolster to make it thoroughly efficient is soeasily and cheaply effected, that the spindles may be maintained attheir highest eticiency instead of being kept in use for reasons ofeconomy long after wear has rendered them relatively in efficient.

That I claim is l. In a spinning spindle the combination with a hollowbase, a tubular blade-containing bearing bolster adapted to be looselysupported in said base, an endwise detachable slip collar adapted toslip over the upper end of the bolster and having interlockingengagement exteriorly and interiorly with the base and with the bolsterrespectively to prevent rotation of the bolster.

2. A bearing bolster for a spindle adapted to be mounted loosely in acontaining base, embracing in its construction a tubular bladecontainingbearing member whose upper end is of reduced external diameter, aslipcollar formed to slip over the reduced upper end portion of said bolsterto permit easy removal and replacement, said collar being provided withan eXteriorly projecting key for engagement with a bolster-containingbase member and being also provided at another point in itscircumference with an internal projecting key adapted to form a tongueand groove sliding engagement with the exterior of said bolster, therebypreventing the rotation of the bolster in said base.

8.' A bearing bolster adapted to be loosely supported in a hollowspindle base, embracing in its construction a tubular blade-containingbearing sleeve, and rotation preventing means comprising an endwiseremovable tubular member having a portion at one side struck up to forma longitudinal projecting rib having slidable engagement with a grooveon the interior of the base and having on its other side an indentedportion adapted to slidably engage a groove on the exterior of thebolster to prevent rotation of the bolster in the base, while allowingthe bolster the desired freedom of movement.

4. A bolster renewing member, embracing in its construction a tubularcollar having exterior and interior ribs for interlocking engagementwith a spindle base and the bearing bolster respectively, and having aninterior annular bearing surface in its upper portion arranged tooverhang the upper end of the tubular bolster to afford a bearing ofproper diameter for the spindle blade.

A bolster renewing device, embracing a tubular sheet metal collar,comprising exterior and interior annular members, the latter beingshorter than the former and affording a blade-engaging upward extensionof the bolster, while the former is provided with means for interlockingthe bolster with the usual bolster-containing spindle base to preventrotation o the bolster.

6. A detachable slip collar for a spindle bearing bolster, embracing asheet metal shell of tubular form whose upper end portion extendsinwardly and downwardly to form an interior annular lateral bearingmember for a spindle blade, the outer member or shell being extendeddown below said bearing member to form detachable telescopic engagementwith the upper end of the bolster and having rotation-preventingengagement with the bolster.

In witness whereof, I have subscribed the above specification.

ERVIN BOWKER.

